Freezer.



G. F. DIOKSON.

FREEZER.

APPLICATION FILED PEB.7.1912.

1,039,654 Patented Sept. 24, 1912.

3 SHEETS-SHEET. l-,

Patented Sept. 24, 1912.

3 SHEETS SHEET G. F. DICKSON.

FREEZER.

APPLIQATION FILED min. 1912. 1 39,654.

I151?! A, Z I. 6 7 W 3 3 2 2mm a a ah l|| G. F. DICKSON.

FREEZER.

APPLICATION rum) mum, 1912.

3 SHEETS-SHEET 3.

1 W 6 s 1 x E 11 i PATENT OFFICE.

cnonsn r. Bronson, or numeric, ILLINOIS, ASSIGNOR T oournormnnas AND BAKERS SUPPLY 00., or CHICAGO, ILLINOIS, A CORPORATION or ILLINOIS.

FREEZER.

To all whom it may concern:

Be it known that I, Gannon F. DICKSON, incitizen of the United States of America, and 'a resident "of Chicago, in the county of (loolnlistate of Illinois, have invented certain'new and useful Improvements in Freezers, ofwliich the following is a specification. This invention relates to that type of freeiers in which a vertically arranged freezing chamber is surrounded by an an nular refrigerating chamber and provided with" revolving scrapers and agitators for thei r u'sual action on the material duringthe progress ofthe freezingioperation. And the present invention has for its object to provide a simple and eflicientstructural formation and combination of parts whereby "increased cooling capacity is'provided at the portion of the freezing chamber where theimaterial is mainly converted from an initial} liquid form to a solid conr i 'on and,

withwhich the flow of the brine ul like refrigerating liquid through the annular rofrig'erating chamber is repeatedly directed agaihstrthe wall of the freezing chamber to a very effective heat transference .,fro;h'., the material undergoing treatment to the brine or like cooling fluid, all as will hereinafter more fully appear.

In the accompanying drawings :-Figure 1, isa side elevation illustrating the general arrangement of an ice-cream freezing apparatusv to which the present invention is applied. ,Fig. 2, is a vertical section of thefreezer. on line m de, Fig. 3. Fig. 3, is a horizontal section on line w a*", Fig. 2. ,-Fig 4, is an, enlarged detail section on line 00 5- 2 Fig. 1. Fig. 5, is a similar view on line ww Fig, i. Fig. 6, is a similar view ongline 22 Fig, 3.

Similar reference numerals indicate like tparts in the several views.

Referring to the drawings, 1 represents the-supporting stand upon which the freeaingaapparatus is supported in a proper elevated position with relation to the brine cooling tub or appliance 2, arranged in adjacent relation to the freezing apparatus, andfso that the:circulation of the brine during the process will be aided by gravity and the work: imposed upon the circulating -pumpmatcrially reduced.

Specification of Letters'Patent.

Application filed. February 7, 1912. Serial No. 676,141.

3 is a vertically arranged annular shell constituting the vertical inclosing wall of the freezing chamber, and the inner wall of the annular brine chamber of the freezing apparatus.

t is a jacketed annular shell constituting the outer inclosing wall of the brine chamber aforesaid. The shell! in the present improvement is formed with an outwardly flared rim 5 for the purpose hereinafter stated.

6 is a lower head forming the closed bottom for the respective freezing and refrigerating chambers above described, and said closure head 6 is formed with an upwardly projecting annular flange 7 to which the lower end of the aforesaid shell 3 is secured by brazing or other usual means. At its periphery said closure head is provided with an upwardly p-Iojecting rim 8 corresponding with the lover rim 5, of the shell 4, and secured thereto by screws 9 or other usual fastening; means lower end of the aforesaid refrigerating portion of the freezing chamber, at which pointthe congealation of the chamber acted .upon is mainly effected, and in consequence a ready and rapid congcalationis attained by the increased volume of brine at such point in the heat transference operation during the progress of the-process.

10 are horizontally arranged annular dams or projections, preferably of a Vshape in cross section, and arranged on the inner surface of the outer shellwl, with their apexes projecting into adjacent relation to the inner shell to form restricted passages at such points and cause the upwardly flowing brine to be repeatedly directed against the shell 3, so that a more effective heat transference will be attained in the freezingoperation of the apparatus.

11 is a step bearing arranged centrally in the head or the lower end of the carrying shaft of the agitating and scraping blades, hereinafter described,

12 a discharge opening -in the head 6 and conn'nunicating with the interior of the freezing chamber above described.

\Vith the described aoustcuction an enla-rged brine capacity is proviied at the chamber, in adjacent relation to the lower 7 13. s a manually actuated slidelcontroling thefdrscharge opening 12 aforesaid.

14 IS a brine inlet Or neck in the outer' rim 8 of the lower closure head 6, for the introduction of the cooled brine into" the lower and expanded end of the refrigerating chamber aforesaid.

15 is an upper annular closure" rim secured to the top of the shells ,3 and 4, by means of downwardly projecting annular flanges 16 and 17, arranged in concentric and 'separated relation, and to whichthe upper ends of the shells 3 and 4 are secured by brazing or other usual" means.

18 is a removable closure head fitting an annular offset inthe margin of the central opening of the aforesaid annular rim 15, and providing access to the top of the freezing chamber. The closure head 18 is secured in place by attachi screws and nuts 19 as shown in Fig. 6, an is only intended to be removed when it is desired "to take out the agitating and scraping meanshereinafter described in a cleaning or like operation of the apparatus.

20 is a filling orifice in the closure head 18 forthe introduction of the material to be treated into the freezing chamber aforesaid, and 21 is a'hinged cover for closingsaid'. orifice after the filling operation aforesaid.

22 is a central bearing neck on the closurehead 18 for the shaft of the hereinafter described scraping and agitating blades, and

, said. The described arrangement permits of'the removal of the shaft along with the removable closure head 18,above described.

26 are radial agitating blades secured in spaced relation on the shaft 25 from one end to the other of the freezing chamber, aforesaid.

27 are vertical scraper blades carried'on the outer end of the radial blades 26 aforesaid, and adapted-to have scraping en agement with the inner vertical face 0 the shell 3, forming the vertical enclosure of the freezing chamber.

28 is a journal bracket secured to the side of the apparatus and provided with horizontal bearings for the driving shaft 29 of the mechanism. Said shaft 29 is preferably formed in two sections connected together by a manually actuated clutch 30 of any usual form, and by which the shaft sec- -referred to, and as fully descri nosaezsa.

tions can be coupled and uncoupled as requiredin t-he-various operations of the apparatus.

I .31 is a belt pully arranged centrally on. the shaft 29 and adaptedto receive motion from a suitable power source.

32-is a pulley mounted on the" outer end of the shaft 29 and connected by a belt 33 with' the driving pulleyof the brine circulating pump hereinafter described.

34 is a bevel gear wheel secured to the inner end of the shaft 29 and having driving engagement with a companion bevel gear wheel 35, mounted on the before described countershaft 24. And said beve gear wheel 35 in turn carries a gear wheel- 36, that meshes with and drives a gear wheel 37 on the carrying shaft 25 of-the agitating and scraping blades aboye described.

38 is a gear casing lnclosing the gear wheels 34, 35, 36 and 37, to protect the op erator from injury while manipulating the apparatus.

39 is a brine circulating pump carried by the bracket 28 aforesaid. Said pump is preferably ofthe rotary t-y e shown, and is provided with a driving s aft and pulley 4O operatively engaged by the belt 33 above described. 7

.41 is the supply pipe of the pump 39,

aforesaid, and extends from the inlet end of said pump to the lower part of the brine cooling tub 2. *The saidtub is preferably of the construction described in detail in a companion application for letters patent, Serial Number 676,142, filed Feby. 7, 1,912.

43 is the outlet or discharge pipe of the pump 39, extending to the lower portion of the refrigerating chamber heretofore de scribed and connecting with the inlet neck 14 thereof. The discharge pi '43'is pro-.

vided with a branch ipe 44', w,- ich connects the pipe 43 with the rinefifeturn'pi'pe hereinafter described, and the connection of said branch pipe 44 to the pipe 43' is controlled by a three-way cook 45; y which the flow of the brine from the'pump 39-can be directed to the refrigerating chamber of the ap-. paratus, or to the bl'lllQ return pipe above ed in the companion application Serial No. 676,142

.spray the returning brine down-upon themass of broken ice contained. in'the upper portion of the tub 1-:

Having thusfully de sc'ribed xn said invention what I claim as new an secure by Letters Patent, i

8. eezer ofa vertically arranged innpr'shell constituting desire to a freezing chamber and an outer shell inclosing the inner shell to form an annular refrigerant chamber, the lower end of said refrigerant chamber having an expanded form, substantially as set forth.

2. The combination in a freezer, of a vertically arranged inner shell constituting a freezing chamber, an outer shell inclosing the inner shell to form an annular refrigerant chamber, and a series of annular dams secured to the inne face of said outer shell, and having a width less than the width of the annular chamber, substantially as set forth.

3. The combination in a freezer, of a vertically arranged inner shell constituting a freezing chamber, an outer shell inclosing the inner shell to form an annular refrigerant chamber, and a series of annular dams secured to the inner face of said outer shell and having a triangular form inger'oss section, substantially as set forth.

4. The combination in a freezer, of a ver-' the lower end of said refrigerating chamber having an expanded form, substantially as set forth.

Signed at Chicago, Illinois, this 1st day of February, 1912.

GEORGE F. DICKSON.

Witnesses Reamer BURNS, HENRY Mom. 

